At least four Dignity Operation militiamen were killed and others wounded in an ambush by Tabu tribe fighters near Sabha earlier on Friday, sources from the city reported.

Sabha Medical Center declared a state of emergency to deal with the casualties.

The sources said heavy fighting broke out in Ghadduwah town, some 65 km south of Sabha between Tabu fighters and 128 brigade of Dignity Operation, a day after the latter announced control of the town.

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